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Distributed energy storage aggregator AGC method based on consistency algorithm

A distributed energy storage, consistent technology, applied in the direction of AC network load balancing, reducing/preventing power oscillation, etc.

Active Publication Date: 2019-08-16
SOUTHEAST UNIV
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Problems solved by technology

[0005] The present invention provides a distributed energy storage aggregator AGC method based on a consensus algorithm, which satisfies the frequency regulation requirements of the system with the minimum frequency regulation cost through the AGC of the external response system and internal balance control of the energy storage power, and solves the problem of distributed energy storage. Technical issues that can participate in the optimal control of power grid frequency regulation in the form of energy aggregators

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  • Distributed energy storage aggregator AGC method based on consistency algorithm
  • Distributed energy storage aggregator AGC method based on consistency algorithm
  • Distributed energy storage aggregator AGC method based on consistency algorithm

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[0057] The present invention will be further described in detail below with reference to the accompanying drawings.

[0058] The distributed energy storage aggregator AGC method based on the consensus algorithm disclosed in the present invention is as follows: figure 1 As shown, it mainly includes two links: filtering link and energy storage output power distribution link.

[0059] Link 1: The main function of the filtering link is to convert the AGC signal P in the model AGC into low frequency components P AGC low and the high frequency component P AGC high , which are respectively passed to traditional units and distributed energy storage aggregators for response.

[0060] Among them, the AGC signal P AGC is calculated by the integration of the regional control error ACE. The frequency threshold of filtering is determined by the relative size of the traditional unit's ramping capability and the capacity of the energy storage aggregator. If the ramp of the traditional...

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Abstract

The invention discloses a distributed energy storage aggregator AGC method based on a consistency algorithm and belongs to the technical field of power generation in which energy storage participatesin power grid frequency modulation. The method comprises a step of initially allocating an AGC signal through a filtering link, a step of allowing an aggregator to integrates distributed energy storage into a whole to participate in AGC, externally tracks a frequency modulation signal, and internally controlling the frequency modulation output of different technical features of the energy storage,a step of taking energy storage frequency modulation cost functions established according to energy storage technology characteristic parameters and real-time electricity as key indicators for distributing the output of each energy storage frequency, and a step of using a multi-agent consistency algorithm inside an aggregator and locally calculating the distributed energy storage by exchanging aconsistency variable with adjacent energy storage to obtain an optimized energy storage output plan. The method performs integrated control of small-scale and modular distributed energy storage of different types, so that distributed energy storage meets the minimum admission capacity requirement of an AGC market, the frequency modulation capability of a power grid is effectively improved, the rapid response advantage of the energy storage is exerted, and the service life of the energy storage is extended at the same time.

Description

technical field [0001] The invention discloses an AGC method for a distributed energy storage aggregator based on a consensus algorithm, which belongs to the technical field of power generation in which energy storage participates in frequency regulation of power grids. Background technique [0002] Replacing fossil energy with renewable energy is an important means to fundamentally solve the problems of global energy shortage, environmental pollution, climate change, etc. Therefore, renewable energy power generation has become the core of energy development strategies of various countries. By the end of 2016, the global installed capacity of wind power and photovoltaic power generation was 467GW and 296GW respectively. my country's installed capacity of wind power and photovoltaic power generation ranks first in the world. However, most of the renewable energy sources such as wind power generation and photovoltaic power generation are intermittent energy sources, and the ou...

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Application Information

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IPC IPC(8): H02J3/24H02J3/32
CPCH02J3/24H02J3/32
Inventor 袁蓓赵剑锋张圣祺
Owner SOUTHEAST UNIV
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